I have a Vizio p50hdtv10a, what is the proper way to test the ic's on the buffer boards? I have put meter in diode mode, grounded on buffer board then ran all through the pins connecting to the panel. I have gone through 2- y sustains, it works for about a hour then starts flashing screen. So its gotta be the buffers shorting out the y boards.
Announcement
Collapse
No announcement yet.
vp50hdtv10a Buffer testing
Collapse
X
-
Re: vp50hdtv10a Buffer testing
Samsung panel? In which case it's unlikely to be the buffers but the power supply going crazy. We are seeing another TV with same symptoms. Nominally 200V output measuring more than 300V! This probably kills the Y-main in short time.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
-
Re: vp50hdtv10a Buffer testing
Check the Vs to be sure. It's pretty rare for IPMs to die from failed buffers on an LG.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
Comment
-
Re: vp50hdtv10a Buffer testing
-Vy looks too low to me. Should be close to -200V. Can you post a picture of the plasma panel voltage sticker?
Also, you need to check Vs when the screen is flickering.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
Comment
-
Re: vp50hdtv10a Buffer testing
I think you need to get -Vy first. -Vy is important for erasing the display, pixels will get stuck on without correct -Vy.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
Comment
-
Re: vp50hdtv10a Buffer testing
Just run it.
As SOON as it starts flickering, cut it off.
If it doesn't short then, no damage done.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
Comment
-
Re: vp50hdtv10a Buffer testing
Yeah, that indicates incorrect Vsc or -Vy, or Setup/Setdn timings, as it ages, you may need to tweak these voltages slightly but NO more than 10V should be necessary.
Sometimes it cannot be resolved without firmware updates made to the control board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
Comment
Comment